What does research grade mean?

It means material released against a written analytical specification for laboratory use — purity by RP-HPLC, identity by mass spectrometry, water content by Karl Fischer — and documented on a batch certificate. It does not mean pharmaceutical grade, and it is not released to any standard that would support use in humans or animals.

Do you ship research peptides across the UK?

Yes. Orders placed before 14:00 on a working day are dispatched the same day on a tracked service. We ship to research addresses, universities, laboratories and registered businesses across the United Kingdom.

Is a certificate of analysis included?

Yes, with every order, matched to the batch code printed on the vial. Certificates can also be looked up at any time using the batch verification page.

Can I buy research peptides as an individual?

No. We supply researchers, laboratories and institutions. Orders that indicate personal use are refused, and nothing we sell is a medicine or fit for human use.

What purity do you release at?

Most peptide lines are released at not less than 99.0% area-percent by RP-HPLC; a small number of longer sequences and the non-peptide compounds are specified at not less than 98.0%. The specification for each line is stated on its product page and the measured figure on its certificate.

28 of 28 lines

Research Peptides UK

Every line below is released against a written analytical specification and ships with the certificate of analysis for its batch. Purity by reversed-phase HPLC, identity by mass spectrometry, water content by Karl Fischer titration — measured on the material you receive, not on a reference sample.

For laboratory research use only. Not for human or veterinary use, and not a medicine, food or cosmetic. Sold to qualified researchers and institutions who accept responsibility for safe handling and lawful use.

All lines Metabolic · 05 Mitochondrial · 05 Neuro · 04 Secretagogue · 06 Regenerative · 04 Immune · 02 Melanocortin · 01 Reagents · 01

Showing all in this class

SortFeatured Name (A–Z)Price, low to high Price, high to low Purity, highest first

2381089-83-2
Most ordered
Retatrutide
Single-molecule agonist at the GIP, GLP-1 and glucagon receptors. Supplied lyophilised and released at ≥ 99.0% by RP-HPLC.
Typical release99.4%
From
£68.00
In stock
1627580-64-6
Most ordered
MOTS-c
A 16-residue mitochondrial-derived peptide encoded in mtDNA. Supplied lyophilised, released at ≥ 99.0% by RP-HPLC.
Typical release99.2%
From
£86.00
In stock
53-84-9
Most ordered
NAD+
The oxidised pyridine dinucleotide cofactor, supplied lyophilised for redox, sirtuin and PARP work. Released at ≥ 98.0% by HPLC.
Typical release98.8%
From
£42.00
In stock
2920938-90-3
Most ordered
N-Acetyl Semax Amidate
Terminally protected Semax analogue — N-acetylated, C-amidated. Released at ≥ 99.0% by RP-HPLC.
Typical release99.5%
From
£39.00
In stock
910463-68-2
Most ordered
Semaglutide
Acylated GLP-1 receptor agonist with a C18 diacid linker. The reference mono-agonist for incretin work.
Typical release99.4%
From
£44.00
In stock
2023788-19-2
Most ordered
Tirzepatide
Dual GIP and GLP-1 receptor agonist. The intermediate step between mono- and tri-agonism.
Typical release99.3%
From
£84.00
In stock
Research compound
5-Amino-1MQ
Small-molecule NNMT inhibitor used in methylation and adipocyte metabolism research.
Typical release98.6%
From
£56.00
In stock
221231-10-3
AOD-9604
Modified C-terminal growth hormone fragment with a tyrosine addition, studied in lipolysis models.
Typical release98.9%
From
£49.00
In stock
736992-21-5
SS-31
Cardiolipin-binding tetrapeptide that concentrates in the inner mitochondrial membrane.
Typical release99.1%
From
£118.00
In stock
307297-39-8
Epitalon
Synthetic tetrapeptide studied in telomerase expression and pineal regulation models.
Typical release99.2%
From
£36.00
In stock
330936-69-1
Humanin
24-residue mitochondrial-derived peptide encoded in the 16S rRNA region of mtDNA.
Typical release98.7%
From
£126.00
In stock
80714-61-0
Semax
The unmodified Semax heptapeptide with free termini. Reference compound for the analogue series.
Typical release99.3%
From
£32.00
In stock
129954-34-3
Selank
Tuftsin analogue with a Pro-Gly-Pro extension, studied in anxiolytic and immunomodulatory models.
Typical release99.1%
From
£38.00
In stock
1401708-83-5
Dihexa
Angiotensin IV analogue studied as an HGF/c-Met potentiator in synaptogenesis models.
Typical release98.5%
From
£89.00
In stock
863288-34-0
CJC-1295 (no DAC)
Tetra-substituted GHRH(1-29) analogue without the drug affinity complex. Short-acting.
Typical release99.0%
From
£42.00
In stock
170851-70-4
Most ordered
Ipamorelin
Selective ghrelin receptor agonist pentapeptide with minimal cross-activity.
Typical release99.2%
From
£34.00
In stock
86168-78-7
Sermorelin
The native GHRH(1-29) fragment, unmodified. The reference sequence for GHRH analogue work.
Typical release98.8%
From
£52.00
In stock
218949-48-5
Tesamorelin
Full-length GHRH(1-44) with an N-terminal hexenoyl group for protease resistance.
Typical release98.6%
From
£114.00
In stock
87616-84-0
GHRP-6
First-generation hexapeptide secretagogue at GHS-R1a, with characteristic off-target endocrine activity.
Typical release99.0%
From
£29.00
In stock
66004-57-7
HGH Fragment 176-191
Unmodified C-terminal growth hormone fragment used in lipolysis research.
Typical release98.7%
From
£39.00
In stock
137525-51-0
Most ordered
BPC-157
Fifteen-residue gastric pentadecapeptide fragment studied in angiogenesis and repair models.
Typical release99.3%
From
£36.00
In stock
77591-33-4
TB-500
Actin-sequestering 43-residue peptide studied in cell migration and repair models.
Typical release98.5%
From
£58.00
In stock
89030-95-5
GHK-Cu
Copper(II) complex of the Gly-His-Lys tripeptide, studied in matrix remodelling and repair.
Typical release98.4%
From
£46.00
In stock
67247-12-5
KPV
The C-terminal tripeptide of α-MSH, studied for anti-inflammatory activity without pigmentation effects.
Typical release99.0%
From
£28.00
In stock
62304-98-7
Thymosin Alpha-1
28-residue N-acetylated thymic peptide studied in T-cell maturation and innate signalling.
Typical release98.8%
From
£72.00
In stock
154947-66-7
LL-37
37-residue cationic host defence peptide, the sole human cathelicidin.
Typical release98.5%
From
£98.00
In stock
189691-06-3
PT-141
Cyclic melanocortin receptor agonist, a metabolite-derived analogue of Melanotan II.
Typical release99.0%
From
£54.00
In stock
Research compound
Bacteriostatic Water
Sterile water with 0.9% benzyl alcohol, for reconstitution where a solution is held for several weeks.
Typical release99.9%
From
£7.50
In stock

Buying research peptides in the UK

Sourcing research grade peptides in the UK comes down to one question: can the supplier show you what they measured on the batch you are being sent? A purity percentage on a product page is a claim. A certificate of analysis carrying the batch code printed on your vial, with the method named and the observed mass stated against theoretical, is evidence.

Ryzen releases every batch against a written specification before it is offered for sale. Purity is determined by gradient reversed-phase HPLC with UV detection at 214 nm, which is where the peptide bond absorbs and therefore where every peptide species in the sample is visible. Identity is confirmed by electrospray mass spectrometry against the theoretical mass for the sequence. Water content is measured by Karl Fischer titration, because residual moisture affects both stability and the concentration you calculate from vial weight.

Material that falls outside specification is rejected rather than sold at a lower grade. Where an oxidised or related species is present at release it is reported as its own line on the certificate instead of being folded into a single figure.

What ships with an order

Every consignment carries the certificate for its batch, matched to the vial. Peptides are supplied lyophilised and sealed, packed with the handling notes for that compound where it needs them — the oxidation-sensitive lines, the hygroscopic ones, and the two that need a DMSO stock rather than aqueous reconstitution. Orders placed before 14:00 on a working day leave the same day, tracked.

Who we supply

Universities, hospital research groups, contract research organisations, analytical laboratories and companies doing product development work. We do not supply individuals for personal use, and nothing in this catalogue is a medicine or fit for human or veterinary use.

Common questions

What does research grade mean?: It means material released against a written analytical specification for laboratory use — purity by RP-HPLC, identity by mass spectrometry, water content by Karl Fischer — and documented on a batch certificate. It does not mean pharmaceutical grade, and it is not released to any standard that would support use in humans or animals.
Do you ship research peptides across the UK?: Yes. Orders placed before 14:00 on a working day are dispatched the same day on a tracked service. We ship to research addresses, universities, laboratories and registered businesses across the United Kingdom.
Is a certificate of analysis included?: Yes, with every order, matched to the batch code printed on the vial. Certificates can also be looked up at any time using the batch verification page.
Can I buy research peptides as an individual?: No. We supply researchers, laboratories and institutions. Orders that indicate personal use are refused, and nothing we sell is a medicine or fit for human use.
What purity do you release at?: Most peptide lines are released at not less than 99.0% area-percent by RP-HPLC; a small number of longer sequences and the non-peptide compounds are specified at not less than 98.0%. The specification for each line is stated on its product page and the measured figure on its certificate.